. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . brown chest hand; upper parts nearly uni-form dark grayish brown ; tail crossed byabout 9 or 10 narrow blackish bands. Adultfemale in normal plumage: like male, butchest patch grayish brown instead of phase, both sexes: whole plumageuniform sooty brown, under tail coverts some-times spotted or barred with rusty or possible gradation is shown by differentindividuals between this black phase and thelig-ht colored normal plumage. Yo
. Handbook of birds of the western United States including the great plains, great basin, Pacific slope, and lower Rio Grande valley . brown chest hand; upper parts nearly uni-form dark grayish brown ; tail crossed byabout 9 or 10 narrow blackish bands. Adultfemale in normal plumage: like male, butchest patch grayish brown instead of phase, both sexes: whole plumageuniform sooty brown, under tail coverts some-times spotted or barred with rusty or possible gradation is shown by differentindividuals between this black phase and thelig-ht colored normal plumage. Young: upperparts blackish brown varied with buffy or yel-lowish brown; head, neck, and under partsbuffy brown, head and neck streaked withblackish; under parts usually more or lessblotched with blackish, Male: length , extent 48,, wing- 14,,tail 8-9, bill . Fernale: length 21-22,extent , , tail 9-10,bill ,80-95. Distribution. — From the arctic reg-ions south to Argentina; in the United States from the Pacific to Wisconsin, Illinois, and Migratory north of South Dakota. From -Biolugical Survey, U. S. Dept. of Agriculture. Fig. 230, Arkansas; casually to Massachusetts,and Nebraska. Nest. — In cottonwoods and other trees, and also in bushes and on rocks,made of sagebrush, willow, or other sticks, lined largely with green leavesand bark. Eggs: 1 to 4, greenish white, fading to yellowish, spotted in-conspicuously with different shades of brown. Food. — Almost entirely small rodents, principally striped gophers andmice, together with grasshoppers and crickets. On the arid wastes and tablelands of southern Arizona, as wellas in the sage and bunch grass districts of Nevada, Oregon, Washing-ton, and Idaho, Swainsons hawk is especially abundant, outnumber-ing, perhaps, all the other Raptores of these regions combined. It iseminently a prairie bird, shunning the densely timbered mountainregions, and being more at home in th
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